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प्रश्न
Answer the following in brief.
Why do the cell potential of lead accumulators decrease when it generates electricity? How the cell potential can be increased?
उत्तर
- The cell potential depends on sulphuric acid concentration (density). As the cell operates to generate current, H2SO4 is consumed. Its concentration (density) decreases and the cell potential is decreased.
- During the recharging process by applying external potential slightly greater than 2 V, H2SO4 is regenerated. As a result, its concentration (density) increases and in turn, the cell potential increases.
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संबंधित प्रश्न
Answer the following in brief.
Write the electrode reactions and net cell reaction in NICAD battery.
Answer the following:
Write the electrode reactions when lead storage cell generates electricity. What are the anode and cathode and write the electrode reactions during its recharging?
Write the potential produced through the NICAD storage cell.
Why is Nickel-cadmium cell referred to as a secondary cell?
Find INCORRECT statement with reference to NICAD cell.
Which of the following statements are CORRECT for NICAD cell and mercury battery?
I. Both can be recharged.
II. Both cannot be recharged.
III. Both are secondary voltaic cells.
IV. Both cells work using an acidic electrolyte.
Identify the INCORRECT statement about mercury battery.
The NICAD cell provides a potential of __________.
The mercury battery provides a constant voltage of ____________.
During discharging the change taking place at cathode in lead accumulator is:
When dry cell is in use the change taking place at cathode is ______.
Write electrode reactions and overall cell reaction when Leclanche's dry cell generates electricity.
In dry cell, what acts as a negative electrode?
What is the density of the solution of sulphuric acid used as an electrolyte in a lead accumulator?
NICAD storage cell is made up of ______ electrodes.
Draw a neat labelled diagram of a lead accumulator.
Write the net cell reaction during discharging of lead accumulator.
